Display apparatus and echo cancellation method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorYury Vladimirovich Ushakov
Life of this patent
Estimating the term…
Abstract
A display apparatus is provided. The display apparatus includes a display, a video receiver, and a processor. The display is configured to display an image. The video receiver is configured to receive an input signal of an impulse response. The processor configured to divide the input signal into sub-bands, apply primary echo-cancellation to the input signal by using sub-band signals corresponding to the sub-bands, estimate a residual echo based on acoustic echo path information obtained in the primary echo-cancellation with regard to each of the sub-bands, and perform secondary echo-cancellation to remove the estimated residual echo from the primary-echo-canceled input signal.
Claims17
A display apparatus comprising:
- a display configured to display an image;
- a signal receiver configured to receive an input signal;
- and
- at least one processor configured to:
- divide the input signal of an impulse response into a plurality of sub-bands,
- apply primary echo-cancellation to the input signal by using a plurality of sub-band signals corresponding to the plurality of sub-bands,
- obtain acoustic echo path information according to the primary echo-cancellation with regard to each of the plurality of sub-bands,
- determine a decaying coefficient of an impulse response corresponding to each of the plurality of sub-bands based on the acoustic echo path information obtained for the sub-bands,
- estimate a residual echo using the decaying coefficient of the impulse response corresponding to each of the plurality of sub-bands, and
- perform secondary echo-cancellation to remove the estimated residual echo from the primary-echo-canceled input signal.
An echo cancellation method of a display apparatus, the method comprising:
- receiving an input signal of an impulse response;
- dividing the input signal of the impulse response into a plurality of sub-bands;
- applying primary echo-cancellation to the input signal by using a plurality of sub-band signals corresponding to the plurality of sub-bands;
- obtaining acoustic echo path information according to the primary echo-cancellation with regard to each of the plurality of sub-bands;
- determining a decaying coefficient of an impulse response corresponding to each of the plurality of sub-bands based on the acoustic echo path information obtained for the sub-bands;
- estimating a residual echo using the decaying coefficient of the impulse response corresponding to each of the plurality of sub-bands;
- and
- performing secondary echo-cancellation to remove the estimated residual echo from the primary-echo-canceled input signal.
Dependencies are inferred from the claim text.